<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>compact</title>
</head>

<body>
    <div>打开浏览器控制台查看结果</div>
    <script>
        const compact = arr => arr.filter(Boolean);
        console.log(compact([0, 1, false, 2, '', 3, 'a', 'e' * 23, NaN, 's', 34]));
    </script>
</body>

</html>